Remove reuse of TimeZoneDistro and equals()

TimeZoneDistro is becoming single-use to better reflect its
normal usage as a wrapper around a stream from a
ParcelFileDescriptor.

This change also removed TimeZoneDistro.equals() now that no code relies on it.

Frameworks code tested with:

make -j30 FrameworksServicesTests
adb install -r -g \
    "out/target/product/angler/data/app/FrameworksServicesTests/FrameworksServicesTests.apk"
adb shell am instrument -e package com.android.server.timezone -w \
    com.android.frameworks.servicestests \
    "com.android.frameworks.servicestests/android.support.test.runner.AndroidJUnitRunner"

Test: See above.
Test: run cts -m CtsLibcoreTestCases
Bug: 31008728
Change-Id: Id128f22bf3d4ea88bf3a09ae9fa3cfce9ced0430
2 files changed